the cation ex-change capacity, exchangenable base capacity and base saturation at A horizon of dark burozem were higher than those of burozem and meadow soil, yet contrary situation appeared in the ex-changeable acidity and hydrolytic acidity.

• 阳离子交换星、交换性盐基总量及盐基饱和度在土壤A层暗棕壤均大于棕壤及草甸土，而交换性酸及水解性酸小于棕壤和草甸土。